Stool.



G. B. MbKINNEY.

STQOL; APPLICATION Hum 11u29. 19121 1,070,278, 'Patented Aug. 12, 1913.

Ey. l.

George E Ies1`er` McKinney Anon/VHS COLUMBIA FLANOGRAPH co.,wAsHlNaTON. D. c.

GEORGE BESTER MCKINNEY, 0F BARRY, ILLINOIS.

STOOL.

Specication of Letters Patent.

Patented Aug. 12,1913.

Application iled May 29, 1912. Serial No. 700,367.

To all whom 25 may concern.'

Be it known that I, GEORGE BESTER MGKINNEY, a citizen of the United States,` and a resident of Barry, in the county of Pike and State of Illinois, have invented a new and Improved Stool, of which the following is a full, clear, and exact description.

This invention relates to stools for use by dentists and for other purposes, and has reference more particularly to a device of this class which comprises a suitably formed seat and a mounting for the seat which permits the same to be positively and flexibly adjusted in any direction, and having means whereby the adjustment can be readily controlled.

The object of the invention is to provide a simple, strong and -durable stool which can be used for a variety of purposesi which is capable of a number of adjustments: which is so constructed that the user thereof can without diliiculty, move it flexibly in any lateral direction, and which can be raised and lowered to any desired height within certain limits.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specilication, in which similar characters of reference indicate corresponding parts in all the figur-es, and in which-,

Figure 1 is a side elevation of a preferred embodiment of my invent-ion: Fig. 2 is an elevated cross-sectional view of the device shown in Fig. 1: Fig. 8 is a transverse sectional view taken on the line 3 3 of Fig. 2: and Fig. 4 is an enlarged sectional view taken on the line 4 4 of Fig. 2.

Before proceeding with a more detailed description of my invention, it is to be understood that the shape of the seat may be varied in accordance with special conditions and the general relation of the parts may be differently arranged without departing from the underlying spirit of the invention.

Referring more particularly to the drawings, I provide a base 1 of upwardly tapered form and having the bottom thereof suitably proportioned to provide a firm support for the stool. The base is hollow and has at the upper end, an opening 8. It is provided about its upper edge with lugs 2, 2 spaced equi-distant and provided with studs 2a'. Flexible members 3 engage the studs 2a of lugs 2 and consist of rods 3a and helical springs 3", so that, in eect, the flexible members are compressible but tend to maintain their normal dimensions. A post 7 of tubular form is associated with the base and extends into the same through an opening 8. A sectional sleeve 4, comprising a plurality of substantially segmental cross-section members, is adjustably mounted upon the post and has pairs of spaced equi-distant lugs 4, between which the Lipper ends of the flexible members 3 are pivotally secured. An open bracket 5 is associated with the sleeve and embraces the same, having a rounded part secured thereto by means of rivets 5a, or in any other suitablemanner. Opposite t-he rounded part, the bracket has .an angularly-disposed part provided with `a threaded opening 5b, in which is received a correspondinglythreaded adjusting rod 6, having a handle by means of which it can be conveniently manipulated, and a rounded clamping head 6b adapted to engage the sectional sleeve, so that the latter can be readily clamped upon the post.

The base is provided at the inside near the upper part thereof, with a helicallygrooved socket la, in which is mounted a strong helical spring 13 extending downwardly from the upper portion of the base. A head 12 is supported within the spring at the lower end thereof, by means of a helically-grooved extension which engages the lower coils of the spring. The head 12 is tubular rand receives the support which is provided with a laterally-extended flange 13a engaging' at the upper rim of the head. An annular plate 11 is positioned under the head 12 about the lower end .of the support i' and rests upon an annular collar 9, having at the upper edge a laterally-disposed flange. The collar has openings which register with corresponding openings in the tubular support and with the same receive a cotter pin 10 or like member for holdingthe parts in place. l

A pin 16 is arranged within the tubular support at the lower end thereof and is mounted in suitable openings at the side of the support. A keeper 14, consisting of an elongated bar, is pivotally mounted upon the pin 1G and has the upper end laterally disposed to engage in any one ot a plurality ot spaced superposed openings 18 vtermed in the wall ot' a tubular post 1.7 telescopic-ally and slidably received within the lcorrespondingly toi-ined outer post T. A "tl-shaped spring 15 has at the ends, coils by means ot' which it is mounted upon the pin 16 and extension engaging the wall et the support. The spring likewise engages the keeper 1A and tends to displace the same trom engagement with the openings 18. A releasing member 19, consisting' of a bar having the upper end laterally disposed, extends into the tubular support 17 through the upper end thereot, being pivotally mounted upon a pin located tor the purpose at the upper end et the support. rlhe laterally-disposed extremity 28 of the releasing member constitutes a handle by means ot which it can be nianipulated.

The seat 22 el the stool may be of any suitable term, size and shape. It is preterably provided with a concave supporting member secured at the under side thereof by means ot screws or rivets, and provided with an internallyethreaded boss by means oit which it is screwed upon the corresponding threaded upper end of the inner post 17. The extremity of the releasing member extends through an opening 24tin the part 21. A spring bar 2O is secured to the releasing member and engages within the supporting element 21 and tends normally to hold the releasing member in a position such that the keeper is operable.

To raise or lower the seat, the keeper 1A is released by suitably lifting the handle 23 of the releasing member, to displace t-he lower end of the bar 19 from the keeper. This permits the spring 15 to disengage `the keeper from one of the openings 18, so that the stool can be easily raised or lowered to its desired height, thereupon the releasing member is set free, so that it will again press the keeper against the side of the tubular post to bring the laterally-disposed upper part et the keeper into engagement with the coiuesponding` opening 18. lt will be readily understood that the spring 13 terms a resilient hanger for the telescopic seat support, and the opening 18 is so proportioned that the support Vcan be flexibly disposed in any lateral direction. rthe spring 13, furthermore, provides the stool with a vertical, Flexible support and renders its use comfortable and pleasant. rlhe lateral flexibility of the stool support is also controlled through the members 13 and their adjustable connection with the outer post, and, as will be readily understood, the rotary inet-ion ot the stool is not obstructed by any member connected to the tube 7 when the segments are not clamped thereto. i'

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A stool, comprising a base, a liexible support associated therewith, a post carried by said support, said support permitting said post to move in any lateral direction, a seat carried by said support, and an additional tlexible connection between said base and said post and comprising spring supports extending upwardly from the base and having an adjustable connection with the post.

2. A stool, comprising a base, a flexible support depending therein, an extensible post having its lower end extending within and carried by said support and provided with means for securing it in dil'erent adjustments, said support permitting said post to move in any lateral direction, a seat carried by said support, and an additional flexible connection between said base and said post and having an adjustable connection with the latter.

8. A stool comprising a base, a post having its lower end supported by and movable with respect to, the said base, spring supports having bearings on the base and extending upwardly therefrom in a series around the post, a sectional collar forming a split and slidable sleeve on the post, and to the sections ot which the upper ends of said spring supports are connected, and means on the said sleeve whereby the latter is rigidly held upon the post, substantially as described.

4. A stool, comprising a hollow base, a post, means for supporting the post in the base to permit it to move laterally, a seat carried by the upper end of the post, a sleeve adjustably secured on the post above the base, and spring supports disposed between said sleeve and said base and arranged in a series around the post.

5. A stool, comprising a hollow base, a helical spring and having its upper end secured to the upper end ot the base and depending within the same, a tubular head carried by the lower end of the spring, a post having its lower end secured in the said head and projecting through the spring above the base, and a. seat provided with a post adjustably secured to the first named post.

6. A stool, comprising a hollow base having a helically grooved inner surface adjacent its upper end, a helical spring member having its upper convolutions disposed within said groove and its lower portion freely depending within the hollow of the base, and an annular plate disposed at the lower end oit the said spring and having a tubular head 'projecting upwardly within the spring and provided with a helically grooved surface engaging the lower convolutons of the said spring, a post depending In testimony whereof I have signed my through the base within the said spring and name to this specification in the presence of having its lower end projecting through the two subscribing witnesses.

said annular plate and its tubular head and GEORGE BESTER MGKINNEY. 5 provided with projections above the head Vitnesses:

and below the said annular plate, and a seat W. N. HART,

carried by the upper end of the post. A. Q. JONES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

